TheMobRules wrote on 2023-10-08, 05:17:
"(C) CREATIVE 0148393000"
that's not the DSP, you can find almost the exact same chip marked as "0148291000" on the older non-PnP cards (like CT2910, which has discrete 8052 MCU on-board) and located on the same place - as that chip is directly 'wired' to the ISA connector gold-fingers my best guess is that's "bus address decoder" that gives access to OPL, EMU8K respective IO port via the ISA bus.
[EDIT] you can even spot a pattern how that chip marking is constructed based on the model number:
0148 XYZT 00:
CT2910 --> 0148 2910 00
CT3930 --> 0148 3930 00